Evolution of the Lithium Abundance of Solar-Type Stars. X. Does Accretion Affect the Lithium Dispersion in the Pleiades?

Details Evolution of the Lithium Abundance of Solar-Type Stars. X. Does Accretion Affect the Lithium Dispersion in the Pleiades? Evolution of the Lithium Abundance of Solar-Type Stars. X. Does Accretion Affect the Lithium Dispersion in the Pleiades?

Nov 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aj....124.2799w&link_type=abstract

The Astronomical Journal, Volume 124, Issue 5, pp. 2799-2812.

Astronomy and Astrophysics

Astronomy

31

Galaxy: Open Clusters And Associations: Individual: Name: Pleiades, Stars: Planetary Systems: Formation, Stars: Planetary Systems: Protoplanetary Disks, Stars: Abundances

Scientific paper

Sixteen G and K dwarfs in the Pleiades cluster were analyzed for evidence that accretion of hydrogen-depleted planetesimals has contributed to the lithium dispersion observed in cluster stars of similar effective temperature. The HiRes spectrograph on the Keck 10 m telescope was used to obtain spectra of slowly rotating Pleiades stars having similar effective temperatures but different lithium abundances. The high-resolution echelle spectra were analyzed for a possible dispersion in the metal abundances correlated with the observed dispersion in lithium abundance. The existence of such a correlation would support the possibility that young stars can replenish their surface lithium by accreting hydrogen-depleted material from a circumstellar disk. The narrow dispersion in the metal abundances of the observed stars makes it unlikely that accretion plays a role in the dispersion in lithium abundances.

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